Electrophilic-nucleophilic properties as a factor in the formation of antifriction and hydrophobic properties of surface-modified metals with ammonium and organosilicon compounds

Keywords: Electrophilic-nucleophilic properties, Dispersed metals, Ethylhydridesiloxane oligomer, Quantum-chemical modelling, Hydrophobicity, Antifriction properties

Abstract

Stabilisation of the functional properties of dispersed and compact metals, as well as the regulation of their reactivity, improvement of water-repellent, antifriction and anti-corrosion properties by creating the protective films on the surface is an urgent problem in relation to obtaining new materials. Previously, research conducted at REC “Nanotechnology” of the St. Petersburg Mining University proved that chemisorption of ethylhydridesiloxane vapours together with surfactants based on quaternary ammonium compounds has a beneficial effect on the water-repellent properties of metals. In order to obtain the physicochemical mechanism of the hydrophobisation of the surface of modified dispersed metals for the first
time, the study of the electrophilic-nucleophilic properties of the active substances of the surface modifiers of metals was carried out using the methods of quantum-chemical modelling using HyperChem software package. The dipole moment, energy of the highest occupied and the lowest unoccupied molecular orbitals, electrophilic-nucleophilic properties were determined. The series of enhancement of  ucleophilic/electrophilic properties and dipole moment for modifiers were obtained. The donor-acceptor properties, the differences in the characteristics of the molecules of alkamon, triamon, and hydrophobic silicone organic liquid were quantitatively and qualitatively established. The regularities of the formation of hydrophobic and antifriction properties in the composition of industrial oil I-20-surface-modified metal with various electrophilic-nucleophilic properties of the applied substances

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Author Biographies

Andrey G. Syrkov, Saint Petersburg Mining University, 21st line V.O., 1, St. Petersburg 199106, Russian Federation

DSc in Engineering, Professor,
Department of General and Technical Physics, Saint
Petersburg Mining University, Saint Petersburg,
Russian Federation; e-mail: Syrkov_AG@pers.spmi.ru

Vadim R. Kabirov, Saint Petersburg Mining University, 21st line V.O., 1, St. Petersburg 199106, Russian Federation

PhD student, Department of
Physical Chemistry, Saint-Petersburg Mining
University, Saint-Petersburg, Russian Federation;
e-mail: vkabirov1@gmail.com

Alexander P. Pomogaibin, Saint Petersburg Mining University, 21st line V.O., 1, St. Petersburg 199106, Russian Federation

Master student, Mineral
Processing Department, Saint Petersburg Mining
University, Saint Petersburg, Russian Federation;
e-mail: Pomogaibin.sasha@yandex.ru

Ngo Kuok Kkhan, Saint Petersburg Mining University, 21st line V.O., 1, St. Petersburg 199106, Russian Federation

PhD student, Department of
Chemical Technologies and Energy Processing, Saint
Petersburg Mining University, Saint Petersburg,
Russian Federation; e-mail: ngoquockhanh292@mail.ru

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Published
2021-06-18
How to Cite
Syrkov, A. G., Kabirov, V. R., Pomogaibin, A. P., & Kkhan, N. K. (2021). Electrophilic-nucleophilic properties as a factor in the formation of antifriction and hydrophobic properties of surface-modified metals with ammonium and organosilicon compounds. Kondensirovannye Sredy I Mezhfaznye Granitsy = Condensed Matter and Interphases, 23(2), 282-290. https://doi.org/10.17308/kcmf.2021.23/3478
Section
Original articles